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if i am using a double program and i have a mono multisample on each oscillator how many voices are used?
if i am using a double program and i have a mono multisample on one oscillator and a stereo multisample on the other oscillator how many voices are used?

I would say 2 resp. 3.

However you have to multiply it with the number of notes played INCLUDING the end of the not (until the release/effects have been finished).

thank you for your reply michelkeijzers,i understand i have to multply it with the number of notes being played.
i do not understand INCLUDING the end of the not (until the release/effects have been finished).
can you explain?

I try to :
The following steps happen when making a piano sound for example:

- you press a key
- you hear the sound (depending on the parameters of the program)
- you depress the key
- you will still hear the sound because the sound starts its so called release part (R in ADSR or what mostly is used ADSSR if I recall right).
- even after the Release part has finished the effects might be audible (e.g. reverb)

This means that the total audible length of one note extends until the release and effects are finished.

So if you play e.g. 4 notes with a double osc sound and then immediately 4 notes one octave higher (still hearing the first 4 notes), you have a polyphony usage of (4 + 4) * 2 = 16.

Now Korg has (probably) make a very sophisticated way of which notes to stop sounding if polyphony usage has been reached (e.g. the most soft tones will stop sounding).

Reverb does not use up polyphony as it is handled by the FX processing resources. Release stage on the other hand has the note still playing and thus using poly.

Although a sound may conceivably have 'sampled reverb' in the release stage of the sample in which case this would use up polyphony.

Anyway, decaying notes will always be 'stolen' first before notes that are still 'active'.

You're right about the effects not using polyphony.

got it! now i understand.
thank you.